Department of Sport Health Sciences, Institute of Health Sciences, Ege University, 35050 Izmir, Turkey.
Coaching Education Department, Faculty of Sport Sciences, Ege University, 35050 Izmir, Turkey.
Int J Environ Res Public Health. 2021 Apr 11;18(8):4005. doi: 10.3390/ijerph18084005.
The purpose of this study was to analyse in detail body weight squat (BWS)' fatigue effect on the range of motions (ROM) of the hip, knee, ankle and ground reaction forces (GRF). Twenty male recreational athletes (24.0 ± 3.1 years, 178.85 ± 7.12 cm and 78.7 ± 11.45 kg) participated in this study. BWS were performed on four load cell platforms until the participants failed to continue. Participants performed 73 ± 27 repetitions and the duration to complete of the repetitions was 140.72 ± 62.28 s during the BWS exercise. The forefoot and hindfoot of the feet were on two load cells, thus, there were two under each foot. All of the data collected was divided into three sections for analysis (24 ± 9 repetitions for each). In terms of GRF of the fore feet and hind feet, significant differences and medium to large effect size were found between each section ( = 0.0060.040, ES = 0.6930.492). No significant differences were found between right and left leg in all sections. Significant differences were found in the ROM of the hip between the sections of first-third ( = 0.044, ES = 0.482) and second-third ( = 0.034, ES = 0.510), the ROM of the knee first-third ( = 0.014, ES = 0.602) and second-third ( = 0.005, ES = 0.701) and for the ROM of the ankle first-second ( = 0.045, ES = 0.479). As a result, end-of-exercise fatigue caused an increase in the ROM of the hip, knee and ankle. Thus, it is observed that fatigue induced increased ROM, also increases the GRF towards the forefeet.
本研究的目的是详细分析体重大蹲（BWS）疲劳对髋关节、膝关节、踝关节活动范围（ROM）和地面反作用力（GRF）的影响。20 名男性娱乐运动员（24.0±3.1 岁，178.85±7.12cm 和 78.7±11.45kg）参与了这项研究。参与者在四个测力平台上进行 BWS，直到他们无法继续为止。参与者完成了 73±27 次重复，完成这些重复的时间为 140.72±62.28s。脚的前脚掌和后脚掌分别放在两个测力台上，因此每只脚下面有两个。收集的所有数据分为三个部分进行分析（每个部分 24±9 次重复）。就前脚掌和后脚掌的 GRF 而言，每个部分之间都存在显著差异和中到大的效应量（=0.0060.040，ES=0.6930.492）。在所有部分中，左右腿之间没有发现显著差异。在髋关节 ROM 方面，第一节到第三节（=0.044，ES=0.482）和第二节到第三节（=0.034，ES=0.510）之间、膝关节第一节到第三节（=0.014，ES=0.602）和第二节到第三节（=0.005，ES=0.701）之间以及踝关节第一节到第二节（=0.045，ES=0.479）之间存在显著差异。结果，运动结束时的疲劳导致髋关节、膝关节和踝关节的 ROM 增加。因此，疲劳引起的 ROM 增加也会导致前脚掌的 GRF 增加。
